Watch-movement



J. RIZEK.

WATCH MOVEMENT.

APPLICATION FILED APR.12,1920.

Patented Nov, 15, 1921.

UNITED STATES.

JOHN RIZEK, OF GUDAHY, WISCONSIN.

WATCH-MOVEMENT.

Specification of Letters Patent.

Patented Nov. 15, 1921.

Application filed April 12, 1920. Serial No. 373,276.

To all whom it may concern Be it known that I, JoHN RIZEK, a .c1t1- zen oi the United States, residing at Cudahy, in the county of Milwaukee and State of \Visconsin, have invented new and useful Improvements in Watch-Movements, of which the following is a specification.

This invention relates to watch movements.

One of the objects of this invention is to provide an improved escapement for watch movements.

Another object is to reduce the number of moving parts or" such movements.

Another object is to provide an 1mproved governor for such movements.

Other objects and advantages will appear from the following specification and claims.

The invention is illustrated in the accompanying drawings wherein,

Figure 1 is a top plan of the balance and anchor or escape wheels of a watch movement;

Fig. 2 is aside elevation of the balance and anchor wheels;

Fig. 3 is a perspective of the balance wheel verge and the lever carried thereby;

Fig. 4 shows one position of the anchor wheel with respect to the balance wheel verge; and

Fig. 5 shows the anchor wheel in another position with respect to the balance wheel verge.

The balance wheel 10 provided with balance lugs 11 is mounted on a verge 12 journaled as usual in jewels provided in plates 13 and 14. The inner end of a hair spring 15 is connected as usual to the verge 12, the outer end being connected to adjustable pin 16 whereby the tension of the spring may be varied. When the balance wheel and verge are rotated in the direction indicated by the arrow A the spring is wound up thereby storing up energy for driving the balance wheel and verge in the opposite direction indicated by the arrow B.

The verge 12 is provided with a longitudinal slot or notch 17 and carries a lever 18 the angular position of which on the verge may be adjusted.

The anchor wheel 20 is mounted on a spindle 21 journaled in the plate 14 and a plate 22. The anchor wheel 20 is driven in the direction of the arrow C primarily from the main spring (not shown) of the watch through a train of gears including the gear 23 meshing with a spindle 21.

The anchor wheel 20 is provided with four pairs of radially extending teeth 25 and 26 projecting from the rim of the anchor wheel. Four upright pins or posts 27 are mounted on the rim of the anchor wheel 20 and each is spaced equidistant from adjacent pairs of teeth.

The pairs of teeth 25 and 26 cooperate with the notch 17 and the lever 18 cooperates with the pins 27 during the operation of the watch movement to control and govern the speed thereof.

During the operation of the watch movement the anchor wheel 20 is constantly urged in the direction indicated by the arrow C by the action of the main spring of the watch.

' The'balance wheel is turned in the direction indicated by the arrow A by the anchor wheel through the engagement of the teeth 25 and 26 with the notch 17 as will more fully hereinafterappear. As the balance wheel is thus turned energy is stored up in the hair spring, which energy serves to turn the balance wheel in the opposite direction as indicated by the arrow B when the engaged tooth on the anchor wheel is released from the notch 17, as will more fully hereinafter appear.

Assuming the balance and anchor wheels to be in the position shown in Fig. 1, the tooth 25 is resting against the verge 12. As the balance wheel 10 is turned in the direction indicated by the arrow B by the stored up energy of the hair spring 15, the verge 12 is also turned until the end of the tooth 25 slips into the notch 17. The balance wheel is then turned in the opposite direction (indicated by the arrow B) by the anchor wheel 20 until the tooth 25 is released from the notch 17, as indicated in Fig. 4. At this time the tooth 26 is resting against the verge 12 and the anchor wheel is locked in this position until after the balance wheel has swung back in the direction indicated by the arrow B.

WVhen the verge 12 has reached its left hand position, the end of the tooth 26 slips into the notch 17. The balance wheel is then turned by the anchor wheel in the direction pinion 24. carried by the indicated by the arrow A until it reaches a position where the tooth 26 escapes from the notch 17 The anchor wheel 20 continues to move under impulsion from the main spring.

The balance wheel swings back in the direction indicated by the arrow B, then begins to return in the direction indicated by the arrow A. The adjustment of hair spring 15 and the position of the lever 18' is such that when the pin 27 reaches the position shown in Fig; 5 the lever 18 is just in front of the pin. The pin 27 therefore strikes the lever 18 and drives the verge 12 and balance wheel 10 on in the direction indicated by the arrow A. I

The anchor wheel continues its movement, and the pin 2'? moves out of engagement with the lever 18. The balance wheel 10 is then turned in the opposite direction due to the stored up energy of the hairspring,while the anchor wheelcontinues its movement until arrested by the strikingof the next tooth 25 against the verge 12. V

This tooth 25 is then ready to slip into the notch 17 when the balance wheel and verge reach the proper position.

This cycle of operations of the balance and anchor wheels and their cooperating escapement mechanism continues so long as.

the watch is running. 7

The described arrangement simplifies watchmovements and avoids the use of the ordinary separately pivoted escape lever be tween th balance wheel and the anchor or escape wheel thereby eliminating several jewels heretofore required.

A watch movement embodying the described arrangement is, cheap to construct,

is easy to repair and will stand rough usage.

Furthermore the described watch movement is more smooth running than others heretofore employed and the possibility of the movement stopping is lessened.

to'those skilled in the art. The drawings.

and descriptions are therefore to be considered in an illustrative and not in a limiting sense.

What is claimed is:

1. In a watch movement, the combination of a rotatable anchor wheel, a balance wheel having a verge in which a slot is provided,

a plurality of pairs of teeth for the anchor whee-l, each tooth being adapted to move in and out of the slot, a lever carried by the verge, and a pin spaced between adjacent pairs of teeth and adapted to cooperate with the lever.

2. In a watch movement, the combination of a rotatable anchor wheel,'a balance wheel having a verge in which a slot is provided, a plurality of equally spaced pairs of teeth for the anchor wheel, each tooth being adapted to move in and out of the slot, and the teeth of each pair being so spaced that as one is moving out of the slot the other of the pair is engaging theverge, a lever carried by the verge, and a plurality of pins for the anchor wheel, each pin spaced equally between adjacent pairs of teeth and adapted to cooperate with the lever."

In witness whereof, I have hereunto subscribed my name.

7 JOHN RIZEK. 

